JPH061850Y2 - Belt-type transmission cooling structure for work vehicles - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention has an engine room in front of a driver's seat, and a radiator and the radiator from the rear of the engine in the engine room. A cooling fan that generates cooling air passing forward is disposed, and an output shaft protruding forward of the engine and a power take-off shaft disposed below the output shaft are linked by a belt-type transmission. The present invention relates to a belt type transmission cooling structure for a work vehicle such as a tractor.

[Conventional technology]

In a work vehicle that produces cooling air as described above, the cooling air that hits the radiator is the outside air, so the radiator has good heat dissipation efficiency, and the cooling air also causes the hot air and noise of the engine to propagate backward. It is possible to reduce the need for measures to protect the instruments installed in the rear part of the engine room from heat, and it is not necessary, and the operating environment can be improved in terms of noise.

In such a conventional work vehicle, a belt type transmission device provided in front of the engine for driving the power take-off shaft by the engine is heated by the radiator and then heated by the hot air of the engine to generate hot air. I was exposed to the cooling wind that became.

[Problems to be solved by the invention]

Therefore, in the conventional case, the belt of the belt type transmission has a high temperature because it is heated by hot air in addition to the heat generated by its own slip, and the belt has a short life.

The purpose of the present invention is to improve the durability of the belt.

[Means for solving problems]

The characteristic structure of the belt type transmission cooling structure for a work vehicle according to the present invention is that a dust discharge port for discharging dust trapped from the intake air of the engine to the outside of the intake passage is provided near the belt transmission. The provided air cleaner is provided with its dust outlet opening toward the belt-type transmission, and the air inlet of the intake passage is located in the engine room rearward of the radiator or outside the engine room. The point is that it is open. The action and effect are as follows.

[Action]

The radiator and the engine are not heated by the hot air but are heated in the same way as the outside air and are at a significantly lower temperature than the cooling air.The air in the rear of the engine room and the outside air are used as intake air for the engine, and an air cleaner is provided. A part of the low-temperature intake air is blown to the belt-type transmission by using the dust discharge function that is used, so the belt-type transmission is applied to the front part of the engine that is heated by the radiator and the hot cooling air heated by the engine hot air Regardless of the arrangement of the device, it is possible to cool the belt type transmission device with the blown low temperature intake air and prevent the belt type transmission device from rising in temperature.

[Effect of device]

As a result, according to the present invention, the structure of the belt can be simplified and the cost can be reduced by simply devising the arrangement of the air cleaner and the intake passage without providing a special cold air fan or the like for cooling the belt type transmission. It has become possible to improve durability.

〔Example〕

 Next, an embodiment of the present invention will be shown.

As shown in FIG. 1, the engine room (3) is arranged in front of the driving section (2) having the seat (1), and the power take-off shaft (5) is provided near the front end of the body frame (4). An attached tractor (an example of a work vehicle), in which the engine (6) is an output shaft for traveling.
It is mounted on the machine body frame (4) in such a posture that the (7) is projected rearward and the output shaft (8) for the power take-off shaft (5) is projected forward.

The rear end of the engine room (3) is composed of the boss (10) of the steering handle (9) or the instrument panel (11) penetrating therethrough.

And, in the engine room (3), a radiator (12) for engine cooling is provided at the rear part of the engine (6).
And a cooling fan (13) that is driven by the engine (6) and generates cooling air that passes through the radiator (12) from the rear to the front.

The power take-off output shaft (8) of the engine (6) and the power take-off shaft (5) are interlocked by a belt type transmission (14).
This belt type transmission (14) is a belt tension type clutch, and as shown in FIG. 2, it is attached to the drive pulley (14A) inserted into the output shaft (8) and the power take-off shaft (5). The driven pulley (14B), the belt (14C) suspended between the pulleys (14A) and (14B), and the tension pulley (14D) that maintains the tension of the belt (14C). As shown in FIG. 3, the pulley (14D) has a plurality of fins that generate air as the tension pulley (14D) rotates.
(15) is attached.

And, in the engine room (3), above the belt type transmission (14), and near the engine (6)
Air cleaner (17) installed in the intake passage (16) for
Is provided.

As shown in FIGS. 4 and 5, the air cleaner (17) has a cylindrical cleaner element assembly (17B) in a horizontally oriented case (17A), with the inner space of the case (17A) as the center. It is provided in a state of being partitioned into a part (17a) and an annular part (17b) around the part (17a), and an intake inlet (17c) to the annular part (17a) is provided in a portion of one side of the peripheral wall of the case (17A) in the axial direction. , And a dust discharge port (17d) that discharges dust captured from the engine intake air to the other end side in the axial direction downward from the annular portion (17b) to the outside of the case (17A) together with a part of the intake air. Respectively,
Intake outlet from the central part (17a) on one wall of the case (17A)
(17e) is formed. The other end wall of the case (17A) is composed of a detachable lid (18).
8) is attached via a wing nut (20) to a stay (19) connected to one end wall side of the case (17A) in a state of being located in the central portion.

Further, in the case (17A), there is provided a fin (21) for imparting a turning force around an axis to the intake air flowing into the annular portion (17b) from the intake inlet (17c), and the dust discharge port (17d) is a valve (2) made of an elastic material that is normally closed and that opens when the pressure in the annular portion exceeds a predetermined value, against its own elasticity.
2) is attached.

The air cleaner (17) has a dust outlet (1
7d) is arranged so as to open toward the belt type transmission (14), and the intake port (16a) of the intake passage (16).
Is opened between the radiator (12) and the instrument panel (11) in the engine room (3).

Therefore, according to the above embodiment configuration, the engine room
The cooling air reaching the front part of the engine (6) in (3) becomes hot air by being heated by the radiator (12) and then heated by the hot air of the engine (6), and as a result, the engine (6) The belt type transmission (14) located in the front part of the vehicle is located in the hot air atmosphere, but a part of the low temperature engine intake air that is not heated by the hot air of the radiator (12) and the engine (6) is Since it is discharged from the dust outlet (17d) of the air cleaner (17) and sprayed onto the belt type transmission (14), the belt (14C) of the belt type transmission (14) can be cooled and the belt type transmission (14C) can be cooled. Fins of tension pulley (14D) of device (14)
Due to the wind action of (15), the intake air blown from the dust discharge port (17d) is agitated with the surrounding air, and the belt type transmission device
Cooling of the atmosphere of (14) can be expected.

In the above embodiment, the intake port (16a) of the intake passage (16) is opened inside the engine room (3), but the intake port (16a) may be opened outside the engine room (3). .

It should be noted that reference numerals are added to the claims of the utility model for convenience of comparison with the drawings, but the present invention is not limited to the structure of the accompanying drawings by the entry.

[Brief description of drawings]

The drawings show an embodiment of a belt-type transmission cooling structure for a work vehicle according to the present invention. FIG. 1 is a side view, FIG. 2 is a front view of a main part, and FIGS. FIG. 5 is a vertical sectional view taken along line VV in FIG. (2) …… Operating section, (3) …… Engine room, (6) …… Engine, (12) …… Radiator, (13) …… Cooling fan, (8)
...... Output shaft, (5) …… Power take-off shaft, (14) …… Belt type transmission, (16) …… Intake passage, (17) …… Air cleaner, (1
7d) ... Dust outlet.

Claims (1)

[Scope of utility model registration request] 1. An engine room (3) is arranged in front of a driving section (2), and a radiator (12) and its radiator (12) are provided at a rear part of an engine (6) in the engine room (3). Cooling fan that generates cooling air passing from 12) to the front
(13) and the output shaft (8) protruding in front of the engine (6) and the power take-off shaft (5) arranged below the output shaft (5) by a belt type transmission (14). In the linked work vehicle, a dust discharge port (17d) is provided near the belt type transmission (14) for discharging dust captured from the engine intake air to the outside of the intake passage (16) together with a part of the intake air. Air Cleaner with (17)
The dust discharge port (17d) is the belt type transmission device (14).
The intake port (16a) of the intake passage (16) is opened toward the rear of the radiator (12) or outside the engine room (3) in the engine room (3). Belt type transmission cooling structure for work vehicles.